Browsing by Subject "Parametric study"

Now showing 1 - 4 of 4
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    A parametric study on the exergoeconomic assessment of a vertical ground-coupled (geothermal) heat pump system
    (2007) Ozgener O.; Hepbasli A.; Ozgener L.
    An exergoeconomic model of a vertical ground-source heat pump residential heating system presented in this study uses exergy and cost energy mass (EXCEM) methods. The data obtained from a ground-source heat pump (GSHP) residential heating system installed at the Solar Energy Institute, Ege University, Turkey, are utilized for calculations at different reference temperature values in the range 0-25 °C. The performance of the geothermal heat pump residential heating system is evaluated to indicate how exergoecomic parameter values change with system. We also undertake a parametric study to investigate how varying reference temperatures will affect the exergoeconomic analysis of the GSHP system. A correlation between the ratio of thermodynamic loss rate to capital cost and reference state temperature is developed. © 2006 Elsevier Ltd. All rights reserved.
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    Parametric study of the effect of reference state on energy and exergy efficiencies of a small industrial pasta drying process
    (Inderscience Publishers, 2009) Ozgener L.; Ozgener O.
    The paper describes a performance evaluation of the industrial pasta process system in Gaziantep, based in Turkey, on energy and exergy analyses. The case study covers the actual system data taken from the system. General energy and exergy analysis of the system are introduced. This analysis, applied to the system using actual thermodynamic data for its performance evaluation in terms of energy and exergy efficiencies, is presented. In addition a parametric study of the effect of varying reference state properties on the energy and exergy efficiencies of the system has been conducted to find optimum performance and operating conditions, and is explained. Copyright © 2009, Inderscience Publishers.
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    Numerical assessment of a slender structure damaged during October 30, 2020, İzmir earthquake in Turkey
    (Springer Science and Business Media B.V., 2021) Demir A.; Altıok T.Y.
    The minarets, which have a tall and slender structure, are quite vulnerable to dynamic forces, i.e. earthquakes and winds. In mainly concrete minarets, since the bond between the concrete blocks is provided by only mortar, the damages caused by high tensile stresses may emerge. This study aims to simulate the behaviour of the concrete Selimiye minaret damaged during the İzmir (Seferihisar-Samos) earthquake on October 30, 2020. The nonlinear finite element model of the Selimiye minaret is created using the Concrete Damage Plasticity failure model. In the nonlinear time history analyses, the İzmir earthquake records obtained from the Bayraklı station, located the closest to the minaret, are used. The damages occurring in the transition segment of the minaret are verified with the finite element method. This study also aims to strengthen insufficient concrete minarets with an innovative, cost-effective, and better workability method. The proposed strengthening method is based on a Fabric Reinforced Concrete Mixture. Finite element models are strengthened from the inner surface using Fabric Reinforced Concrete Mixture composites reinforced with glass and steel fibers. As a result of the finite element analyses, it is concluded that the concrete minarets can be strengthened from the inner surface with the Steel Fabric Reinforced Concrete Mixture method in safety. In addition, with a parametric study, it has been determined that partial strengthening applications, which are more economical and aesthetic, can be more effective on structural performance than full strengthening applications. © 2021, The Author(s), under exclusive licence to Springer Nature B.V.
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    A parametric study on energy, exergy and exergoeconomic analysis of a paint curing oven
    (Inderscience Publishers, 2023) Ayvalı Z.N.; Ozgener O.; Ozgener L.
    This study examines a drying process for paint-drying ovens with actual operating data. This process is one of the most energy consuming processes in the manufacturing process of a company that produces propeller shafts in Manisa. This paper aims to determine the energy and exergy belts on a sectoral basis in light of the examined company and make an efficiency analysis. As a result of the analysis, the exergoeconomic values are calculated as the energy loss/cost ratio in current fresh air temperature is Ren: 7.368 W/$, exergy losses/cost Rex: 0.318 W/$, and the total energy need is reduced by 13.25%. Copyright © 2023 Inderscience Enterprises Ltd.